Lex
Resentment isn't just a killer for alcoholics. It can dominate your life. We do get to choose who affects us. We must give someone our permission. You cannot hurt or make me angry or take up my thoughts all day unless I grant you the power to do so.
I think the earlier in the dissolution of a relationship one deals with this, the better. Beware of "schadenfreude." That is taking pleasure in another's misfortune. Wish him a healthy, happy and prosperous life and proceed to get on with yours.
warren